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Fix some off-by-one errors with the ending address of candidate regions

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when attempting to grow a window.
This commit is contained in:
John Baldwin 2011-06-10 13:24:56 +00:00
parent 049dc0d1ff
commit a49dcb469c
1 changed files with 4 additions and 3 deletions
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7
sys/dev/pci/pci_pci.c
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@ -916,7 +916,8 @@ pcib_grow_window(struct pcib_softc *sc, struct pcib_window *w, int type,
/* Move end_free down until it is properly aligned. */
end_free &= ~(align - 1);
front = end_free - count;
end_free--;
front = end_free - (count - 1);
/*
* The resource would now be allocated at (front,
@ -944,7 +945,7 @@ pcib_grow_window(struct pcib_softc *sc, struct pcib_window *w, int type,
/* Move start_free up until it is properly aligned. */
start_free = roundup2(start_free, align);
back = start_free + count;
back = start_free + count - 1;
/*
* The resource would now be allocated at (start_free,
@ -957,7 +958,7 @@ pcib_grow_window(struct pcib_softc *sc, struct pcib_window *w, int type,
if (bootverbose)
printf("\tback candidate range: %#lx-%#lx\n",
start_free, back);
back = roundup2(back, w->step) - 1;
back = roundup2(back + 1, w->step) - 1;
back -= rman_get_end(w->res);
} else
back = 0;